hmm Keys are cool I mean a leathal weapon in the right hands, and entry to your house or other locked things. Not to mention sometimes your keys will work on someone elses front door too like before my friend around the corner moved out and my front door got changed my keys opened his house I remember us just going around and letting ourselves in to his house and his mom didn't mind. (they had sky TV)

Rubber duckies plainly suck in my humblest of opinions I mean what is their point? to be shoved painfully head first up someone's bum?

Ice cubes these are the real contest for the keys here in my opinion, they can be used to cool your drink on hot days (though leave them too long and you just get a watery drink) they're good for swollen injuries too such as broken bones and stuff, they can help the depressed through their self harm problems as whilst holding one untill it has completely melted in your clenched fist can hurt like hell it is not ever going to leave a scar. They can also be used for the naughty stuff to make it feel very different or special and that is always good.

Ice cube victory in my opinion.